High-temperature butterfly valve

Abstract

The utility model discloses a high-temperature butterfly valve, which relates to the technical field of high-temperature butterfly valves, and comprises a valve body, an indicating arrow, a closing position indicator, an opening position indicator and a butterfly plate, an upper valve shaft is arranged at the top end in the valve body, a middle valve shaft is arranged in the valve body and below the upper valve shaft, the outer side of the upper valve shaft and the outer side of the middle valve shaft are respectively sleeved with a heat insulation flange, and the butterfly plate is arranged in the middle valve shaft. Cylindrical pins are arranged in the heat insulation flanges, the upper valve shaft and the middle valve shaft in a penetrating mode, a heat insulation pad is arranged between the two heat insulation flanges, a lower valve shaft is arranged at the bottom end in the valve body, and a butterfly plate is installed at the position, between the middle valve shaft and the lower valve shaft, in the valve body. Fault treatment is achieved at the connecting position of the upper valve shaft and the middle valve shaft through the heat insulation flanges, the cylindrical pins and the second hexagonal head bolts, heat is reduced, the heat insulation pad is additionally arranged between the heat insulation flanges, meanwhile, the upper valve shaft is lengthened, and therefore damage to the butterfly valve caused by high temperature can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature butterfly valves, in particular to a high-temperature butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. It generally includes a valve body, a butterfly plate (valve disc), a sealing ring and other structures. The sealing ring is set on the edge of the butterfly plate. When the ball valve is closed, the sealing ring is clamped between the butterfly plate and the inner wall of the fluid channel to fill the gap between the butterfly plate and the valve body, thereby achieving a sealing effect. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, and mainly plays a cutting and throttling role in the pipeline.

[0003] At present, when the existing butterfly valves are in use, in order to facilitate operation, the butterfly plate realizes the opening and closing functions by rotating the valve shaft. When the butterfly valve works under high temperature conditions, the high temperature passes through the valve shaft and conducts heat to the top of the valve shaft, which makes it easy to damage the actuator circuit or the sealing ring, etc., thereby easily causing the butterfly valve to necrotize. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a high-temperature butterfly valve to solve the technical problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a high-temperature butterfly valve, comprising a valve body, an indicator arrow, a closed position indicator, an open position indicator and a butterfly plate, an upper valve shaft is arranged at the top end of the inner part of the valve body, a middle valve shaft is arranged at the inner part of the valve body below the upper valve shaft, the outer sides of the upper valve shaft and the middle valve shaft are both sleeved with thermal insulation flanges, cylindrical pins are penetrated through the thermal insulation flanges and the inner parts of the upper valve shaft and the middle valve shaft, a thermal insulation pad is arranged between the two thermal insulation flanges, a lower valve shaft is arranged at the bottom end of the inner part of the valve body, a butterfly plate is installed at the inner part of the valve body between the middle valve shaft and the lower valve shaft, and the outer sides of the middle valve shaft and the lower valve shaft are both sleeved with spacing gaskets that fit the valve body.

[0006] Preferably, second hexagonal head bolts are provided penetratingly inside the two thermal insulation flanges, and the outer sides of the second hexagonal head bolts are threadedly connected with hexagonal nuts.

[0007] Preferably, the thermal insulation flange and the upper valve shaft and the middle valve shaft all form a locking structure through cylindrical pins, and the two cylindrical pins are symmetrically arranged up and down with respect to the central axis of the thermal insulation pad.

[0008] Preferably, the outer side of the upper valve shaft is sleeved with an external spherical bearing with a seat, the top end of the inner side of the valve body is welded with a first hexagonal head bolt penetrating the external spherical bearing with a seat, and the outer side of the first hexagonal head bolt is threadedly connected with a hexagonal nut.

[0009] Preferably, a high-purity graphite bearing is provided inside the valve body on the outside of the middle valve shaft, a packing is provided between the middle valve shaft and the valve body, a packing pressure ring is provided inside the valve body at the top of the packing, and a transparent cover is provided outside the middle valve shaft at the top of the packing pressure ring.

[0010] Preferably, a hexagon socket screw penetrating the transparent cover is welded to the top end of the valve body, and a hexagon socket screw is threadedly connected to the outer side of the hexagon socket screw.

[0011] Preferably, the valve body consists of an outer frame and an inner frame, and the inner frame is made of high-temperature castable material.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] The utility model reduces heat by implementing fault treatment at the connection between the upper valve shaft and the middle valve shaft through a heat-insulating flange, a cylindrical pin and a second hexagonal bolt, and adds a heat-insulating pad between the heat-insulating flanges, while lengthening the upper valve shaft, so as to reduce the damage to the butterfly valve caused by high temperature;

[0014] The utility model adopts high-temperature casting material for the inner frame of the valve body, so that the high-temperature butterfly valve has the characteristics of light weight, high density, high temperature resistance, no deformation, etc., thereby preventing the butterfly plate from being stuck due to thermal deformation of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 3 It is a partial bottom view of the utility model;

[0018] Figure 4 It is a side view of the utility model;

[0019] Figure 5 It is a top view of the utility model.

[0020] In the figure: 1. valve body; 2. middle valve shaft; 3. lower valve shaft; 4. upper valve shaft; 5. indicator arrow; 6. closed position indicator; 7. open position indicator; 8. thermal insulation pad; 9. thermal insulation flange; 10. transparent cover; 11. packing press ring; 12. spacer; 13. butterfly plate; 14. first hexagonal head bolt; 15. hexagon socket screw; 16. cylindrical pin; 17. high-purity graphite bearing; 18. packing; 19. second hexagonal head bolt; 20. outer spherical bearing with seat. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0022] The following describes an embodiment of the utility model based on its overall structure.

[0023] A high temperature butterfly valve, such as Figure 1 and Figure 3 As shown, it includes a valve body 1, an indication arrow 5, a closing position indication 6, an opening position indication 7 and a butterfly plate 13. The indication arrow 5 is arranged in the middle of the bottom end of the valve body 1, the bottom end of the valve body 1 is located on one side of the indication arrow 5 and is provided with an opening position indication 7, the bottom end of the valve body 1 is located above the indication arrow 5 and is provided with the bottom end of the valve body 1 is located on one side of the indication arrow 5. The valve body 1 is composed of an outer frame and an inner frame, and the inner frame is made of high-temperature castable, so that the high-temperature butterfly valve has the characteristics of light weight, high density, high temperature resistance, no deformation, etc., thereby preventing the butterfly plate 13 from being stuck due to thermal deformation of the valve body 1.

[0024] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 It can be seen that an upper valve shaft 4 is provided at the top end of the valve body 1, and a middle valve shaft 2 is provided inside the valve body 1 below the upper valve shaft 4. The outer sides of the upper valve shaft 4 and the middle valve shaft 2 are both sleeved with heat-insulating flanges 9, and cylindrical pins 16 are penetrated through the heat-insulating flanges 9 and the interiors of the upper valve shaft 4 and the middle valve shaft 2. A heat-insulating pad 8 is provided between the two heat-insulating flanges 9, and a lower valve shaft 3 is provided at the bottom end of the valve body 1. A butterfly plate 13 is installed inside the valve body 1 between the middle valve shaft 2 and the lower valve shaft 3, and the outer sides of the middle valve shaft 2 and the lower valve shaft 3 are both sleeved with a spacer gasket 12 that fits the valve body 1. The heat-insulating flange 9, the cylindrical pin 16 and the second hexagonal head bolt 19 are used to achieve fault treatment at the connection between the upper valve shaft 4 and the middle valve shaft 2 to reduce heat, and the heat-insulating pad 8 is added between the heat-insulating flanges 9. At the same time, the upper valve shaft 4 is lengthened, so that the damage to the butterfly valve caused by high temperature can be reduced.

[0025] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 It can be seen that a hexagon socket screw 15 penetrating the transparent cover 10 is welded to the top of the valve body 1 , and a hexagon socket screw 15 is threadedly connected to the outer side of the hexagon socket screw 15 , so that the transparent cover 10 can be firmly installed on the valve body 1 .

[0026] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 It can be seen that the outer side of the upper valve shaft 4 is sleeved with an external spherical bearing 20 with a seat, and the top end of the valve body 1 is welded with a first hexagonal head bolt 14 that penetrates the external spherical bearing 20 with a seat, and the outer side of the first hexagonal head bolt 14 is threadedly connected with a hexagonal nut, which can realize the firm installation of the external spherical bearing 20 with a seat on the valve body 1, thereby increasing the stability during operation.

[0027] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 It can be seen that the inside of the two thermal insulation flanges 9 is penetrated by a second hexagonal head bolt 19, the outer side of the second hexagonal head bolt 19 is threadedly connected with a hexagonal nut, and the thermal insulation flange 9 and the upper valve shaft 4 and the middle valve shaft 2 all form a clamping structure through a cylindrical pin 16. The two cylindrical pins 16 are symmetrically arranged up and down with the central axis of the thermal insulation pad 8, which can facilitate the firm connection between the upper valve shaft 4 and the middle valve shaft 2 to prevent loosening.

[0028] See also Figure 1 It can be seen that a high-purity graphite bearing 17 is provided inside the valve body 1 on the outside of the middle valve shaft 2, a packing 18 is provided between the middle valve shaft 2 and the valve body 1, a packing pressing ring 11 is provided inside the valve body 1 on the top of the packing 18, and a transparent cover 10 is provided on the outside of the middle valve shaft 2 on the top of the packing pressing ring 11, and the packing pressing ring 11 can be used to tighten the packing 18 to prevent it from spilling.

[0029] The working principle of the utility model is: when the high-temperature butterfly valve is in use, the two sides of the valve body 1 can be connected to the pipeline through flanges, and the upper valve shaft 4 on the top of the valve body 1 can be connected to a driving device, and then the butterfly plate 13 can be driven to translate and rotate through the cooperation of the driving device and the upper valve shaft 4, the middle valve shaft 2, and the lower valve shaft 3, so that the valve body 1 can be controlled by the opening and closing of the butterfly plate 13. This is the use feature of the high-temperature butterfly valve. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0030] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A high-temperature butterfly valve, comprising a valve body (1), an indication arrow (5), a closed position indication (6), an open position indication (7) and a butterfly plate (13), characterized in that: An upper valve shaft (4) is arranged at the top end of the valve body (1), a middle valve shaft (2) is arranged inside the valve body (1) below the upper valve shaft (4), the outer sides of the upper valve shaft (4) and the middle valve shaft (2) are both sleeved with heat insulation flanges (9), cylindrical pins (16) are penetrated through the heat insulation flanges (9) and the interiors of the upper valve shaft (4) and the middle valve shaft (2), a heat insulation pad (8) is arranged between the two heat insulation flanges (9), a lower valve shaft (3) is arranged at the bottom end of the valve body (1), a butterfly plate (13) is installed inside the valve body (1) between the middle valve shaft (2) and the lower valve shaft (3), and the outer sides of the middle valve shaft (2) and the lower valve shaft (3) are both sleeved with spacing gaskets (12) that fit the valve body (1).

2. A high temperature butterfly valve according to claim 1, characterized in that: A second hexagonal head bolt (19) is provided through the interior of the two heat-insulating flanges (9), and a hexagonal nut is threadedly connected to the outer side of the second hexagonal head bolt (19).

3. A high temperature butterfly valve according to claim 1, characterized in that: The heat-insulating flange (9) and the upper valve shaft (4) and the middle valve shaft (2) all form a locking structure via a cylindrical pin (16), and the two cylindrical pins (16) are symmetrically arranged up and down about the central axis of the heat-insulating pad (8).

4. A high temperature butterfly valve according to claim 1, characterized in that: The outer side of the upper valve shaft (4) is sleeved with an external spherical bearing with a seat (20), and the top end of the interior of the valve body (1) is welded with a first hexagonal bolt (14) that passes through the external spherical bearing with a seat (20), and the outer side of the first hexagonal bolt (14) is threadedly connected with a hexagonal nut.

5. A high temperature butterfly valve according to claim 1, characterized in that: A high-purity graphite bearing (17) is arranged inside the valve body (1) and on the outside of the middle valve shaft (2); a packing (18) is arranged between the middle valve shaft (2) and the valve body (1); a packing pressing ring (11) is arranged inside the valve body (1) and on the top of the packing (18); and a transparent cover (10) is arranged outside the middle valve shaft (2) and on the top of the packing pressing ring (11).

6. A high temperature butterfly valve according to claim 5, characterized in that: A hexagon socket screw (15) penetrating the transparent cover (10) is welded to the top end of the valve body (1), and a hexagon socket screw (15) is threadedly connected to the outer side of the hexagon socket screw (15).

7. A high temperature butterfly valve according to claim 1, characterized in that: The valve body (1) consists of an outer frame and an inner frame, and the inner frame is made of high-temperature castable material.

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